Medicube — Deep Vita C Ampoule 2.0 · Set 3 × 10g

14.5% ascorbic acid is a high and clinically relevant concentration—within the effective range (10-20% for active serums). Its formulation in individual ampoules partially solves the stability challenge: each tube is opened fresh, with no oxidation accumulating between uses. Refrigeration is a manufacturer's instruction that must be strictly followed to maintain activity. Glutathione enhances antioxidant action and acts on the melanogenesis pathway (tyrosinase inhibition + pheomelanin orientation). Pullulan (a fermentation polysaccharide) forms a fast-drying elastic film that provides an immediate surface lifting effect. Two formulation points of caution: 1. Ethylhexyl Methoxycinnamate (OMC, position 13 in the INCI) is a chemical UV filter that formulators use to protect ascorbic acid from photo-oxidation in the bottle. EU-approved (up to 10%), it is under discussion as a potential endocrine disruptor—the European Commission is reviewing its restriction. To be mentioned for transparency. 2. The declared fragrance allergens (Linalool, Limonene, Citronellol, Coumarin, Eugenol, Geraniol) come from the citrus extracts and oils present in the formula. Individuals sensitive to fragrances should perform a patch test. Best Before Date 04/2027: ~10 months at the time of sale (May 2026). Prioritize clearance. Do not reorder without verifying a better BBD.